Yellow and Blue Texture

Question

There's an odd yellow and blue texture on some of the trucks I have in version 0.4.6. I heard I can switch the render system, but I have no options besides the OpenGL system. Also heard it could be a messed-up texture in my folders, but idk which one. Any solutions?

(I wish I could upload a picture but the site won't let me, if you need a picture of what I'm talking about, dm me)